.chen{
	justify-content: flex-start;
}
.chen ul{
	display: none;
}
.chen span{
	position: static;
	margin-left: 15px;
}
nav ul{
	justify-content: flex-start;
}
nav ul li{
	display: none;
}
nav ul li:nth-child(2){
	display: block;
}
nav ul li:nth-child(3){
	display: block;
}
nav ul li:nth-child(4){
	display: block;
}
.yu{
	flex-wrap: wrap;
	width: 100%;
}
.yu .list{
	width: 100%;
}
.yu .listtwo{
	width: 100%;
}
footer ul{
	display: none;
}
footer p{
	background-color: #007D6B;
	color: #fff;
}